LLVM 18.0.0git
Namespaces | Macros | Enumerations | Functions | Variables
HexagonFrameLowering.cpp File Reference
#include "HexagonFrameLowering.h"
#include "HexagonBlockRanges.h"
#include "HexagonInstrInfo.h"
#include "HexagonMachineFunctionInfo.h"
#include "HexagonRegisterInfo.h"
#include "HexagonSubtarget.h"
#include "HexagonTargetMachine.h"
#include "MCTargetDesc/HexagonBaseInfo.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/LivePhysRegs.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachinePostDominators.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Function.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/Pass.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <iterator>
#include <limits>
#include <map>
#include <optional>
#include <utility>
#include <vector>

Go to the source code of this file.

Namespaces

namespace  llvm
 This is an optimization pass for GlobalISel generic memory operations.
 

Macros

#define DEBUG_TYPE   "hexagon-pei"
 

Enumerations

enum  SpillKind { SK_ToMem , SK_FromMem , SK_FromMemTailcall }
 

Functions

void llvm::initializeHexagonCallFrameInformationPass (PassRegistry &)
 
FunctionPassllvm::createHexagonCallFrameInformation ()
 
 INITIALIZE_PASS (HexagonCallFrameInformation, "hexagon-cfi", "Hexagon call frame information", false, false) FunctionPass *llvm
 
static Register getMax32BitSubRegister (Register Reg, const TargetRegisterInfo &TRI, bool hireg=true)
 Map a register pair Reg to the subregister that has the greater "number", i.e.
 
static Register getMaxCalleeSavedReg (ArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo &TRI)
 Returns the callee saved register with the largest id in the vector.
 
static bool needsStackFrame (const MachineBasicBlock &MBB, const BitVector &CSR, const HexagonRegisterInfo &HRI)
 Checks if the basic block contains any instruction that needs a stack frame to be already in place.
 
static bool hasTailCall (const MachineBasicBlock &MBB)
 Returns true if MBB has a machine instructions that indicates a tail call in the block.
 
static bool hasReturn (const MachineBasicBlock &MBB)
 Returns true if MBB contains an instruction that returns.
 
static MachineInstrgetReturn (MachineBasicBlock &MBB)
 Returns the "return" instruction from this block, or nullptr if there isn't any.
 
static bool isRestoreCall (unsigned Opc)
 
static bool isOptNone (const MachineFunction &MF)
 
static bool isOptSize (const MachineFunction &MF)
 
static bool isMinSize (const MachineFunction &MF)
 
static bool enableAllocFrameElim (const MachineFunction &MF)
 
static std::optional< MachineBasicBlock::iteratorfindCFILocation (MachineBasicBlock &B)
 
static const chargetSpillFunctionFor (Register MaxReg, SpillKind SpillType, bool Stkchk=false)
 
static bool needToReserveScavengingSpillSlots (MachineFunction &MF, const HexagonRegisterInfo &HRI, const TargetRegisterClass *RC)
 Returns true if there are no caller-saved registers available in class RC.
 
static void dump_registers (BitVector &Regs, const TargetRegisterInfo &TRI)
 

Variables

static cl::opt< boolDisableDeallocRet ("disable-hexagon-dealloc-ret", cl::Hidden, cl::desc("Disable Dealloc Return for Hexagon target"))
 
static cl::opt< unsignedNumberScavengerSlots ("number-scavenger-slots", cl::Hidden, cl::desc("Set the number of scavenger slots"), cl::init(2))
 
static cl::opt< int > SpillFuncThreshold ("spill-func-threshold", cl::Hidden, cl::desc("Specify O2(not Os) spill func threshold"), cl::init(6))
 
static cl::opt< int > SpillFuncThresholdOs ("spill-func-threshold-Os", cl::Hidden, cl::desc("Specify Os spill func threshold"), cl::init(1))
 
static cl::opt< boolEnableStackOVFSanitizer ("enable-stackovf-sanitizer", cl::Hidden, cl::desc("Enable runtime checks for stack overflow."), cl::init(false))
 
static cl::opt< boolEnableShrinkWrapping ("hexagon-shrink-frame", cl::init(true), cl::Hidden, cl::desc("Enable stack frame shrink wrapping"))
 
static cl::opt< unsignedShrinkLimit ("shrink-frame-limit", cl::init(std::numeric_limits< unsigned >::max()), cl::Hidden, cl::desc("Max count of stack frame shrink-wraps"))
 
static cl::opt< boolEnableSaveRestoreLong ("enable-save-restore-long", cl::Hidden, cl::desc("Enable long calls for save-restore stubs."), cl::init(false))
 
static cl::opt< boolEliminateFramePointer ("hexagon-fp-elim", cl::init(true), cl::Hidden, cl::desc("Refrain from using FP whenever possible"))
 
static cl::opt< boolOptimizeSpillSlots ("hexagon-opt-spill", cl::Hidden, cl::init(true), cl::desc("Optimize spill slots"))
 
static cl::opt< unsignedSpillOptMax ("spill-opt-max", cl::Hidden, cl::init(std::numeric_limits< unsigned >::max()))
 
static unsigned SpillOptCount = 0
 

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE   "hexagon-pei"

Definition at line 65 of file HexagonFrameLowering.cpp.

Enumeration Type Documentation

◆ SpillKind

enum SpillKind
Enumerator
SK_ToMem 
SK_FromMem 
SK_FromMemTailcall 

Definition at line 1186 of file HexagonFrameLowering.cpp.

Function Documentation

◆ dump_registers()

static void dump_registers ( BitVector Regs,
const TargetRegisterInfo TRI 
)
static

◆ enableAllocFrameElim()

static bool enableAllocFrameElim ( const MachineFunction MF)
static

◆ findCFILocation()

static std::optional< MachineBasicBlock::iterator > findCFILocation ( MachineBasicBlock B)
static

◆ getMax32BitSubRegister()

static Register getMax32BitSubRegister ( Register  Reg,
const TargetRegisterInfo TRI,
bool  hireg = true 
)
static

Map a register pair Reg to the subregister that has the greater "number", i.e.

D3 (aka R7:6) will be mapped to R7, etc.

Definition at line 248 of file HexagonFrameLowering.cpp.

References SubReg, and TRI.

Referenced by getMaxCalleeSavedReg().

◆ getMaxCalleeSavedReg()

static Register getMaxCalleeSavedReg ( ArrayRef< CalleeSavedInfo CSI,
const TargetRegisterInfo TRI 
)
static

Returns the callee saved register with the largest id in the vector.

Definition at line 268 of file HexagonFrameLowering.cpp.

References E, llvm::ArrayRef< T >::empty(), getMax32BitSubRegister(), getReg(), I, llvm::ArrayRef< T >::size(), and TRI.

◆ getReturn()

static MachineInstr * getReturn ( MachineBasicBlock MBB)
static

Returns the "return" instruction from this block, or nullptr if there isn't any.

Definition at line 360 of file HexagonFrameLowering.cpp.

References I, and MBB.

Referenced by llvm::HexagonFrameLowering::emitPrologue().

◆ getSpillFunctionFor()

static const char * getSpillFunctionFor ( Register  MaxReg,
SpillKind  SpillType,
bool  Stkchk = false 
)
static

◆ hasReturn()

static bool hasReturn ( const MachineBasicBlock MBB)
static

Returns true if MBB contains an instruction that returns.

Definition at line 351 of file HexagonFrameLowering.cpp.

References MBB, MI, and llvm::MachineBasicBlock::terminators().

◆ hasTailCall()

static bool hasTailCall ( const MachineBasicBlock MBB)
static

Returns true if MBB has a machine instructions that indicates a tail call in the block.

Definition at line 342 of file HexagonFrameLowering.cpp.

References llvm::MachineBasicBlock::end(), llvm::MachineBasicBlock::getLastNonDebugInstr(), I, and MBB.

◆ INITIALIZE_PASS()

INITIALIZE_PASS ( HexagonCallFrameInformation  ,
"hexagon-cfi"  ,
"Hexagon call frame information"  ,
false  ,
false   
)

Definition at line 239 of file HexagonFrameLowering.cpp.

◆ isMinSize()

static bool isMinSize ( const MachineFunction MF)
inlinestatic

◆ isOptNone()

static bool isOptNone ( const MachineFunction MF)
inlinestatic

◆ isOptSize()

static bool isOptSize ( const MachineFunction MF)
inlinestatic

Definition at line 387 of file HexagonFrameLowering.cpp.

References F, and llvm::MachineFunction::getFunction().

◆ isRestoreCall()

static bool isRestoreCall ( unsigned  Opc)
static

Definition at line 367 of file HexagonFrameLowering.cpp.

Referenced by llvm::HexagonFrameLowering::emitPrologue().

◆ needsStackFrame()

static bool needsStackFrame ( const MachineBasicBlock MBB,
const BitVector CSR,
const HexagonRegisterInfo HRI 
)
static

Checks if the basic block contains any instruction that needs a stack frame to be already in place.

Definition at line 286 of file HexagonFrameLowering.cpp.

References llvm::BitVector::find_first(), llvm::BitVector::find_next(), MBB, and MI.

◆ needToReserveScavengingSpillSlots()

static bool needToReserveScavengingSpillSlots ( MachineFunction MF,
const HexagonRegisterInfo HRI,
const TargetRegisterClass RC 
)
static

Returns true if there are no caller-saved registers available in class RC.

Definition at line 1527 of file HexagonFrameLowering.cpp.

References llvm::HexagonRegisterInfo::getCallerSavedRegs(), llvm::MachineFunction::getRegInfo(), llvm::MCRegAliasIterator::isValid(), MRI, and P.

Referenced by llvm::HexagonFrameLowering::determineCalleeSaves().

Variable Documentation

◆ DisableDeallocRet

cl::opt< bool > DisableDeallocRet("disable-hexagon-dealloc-ret", cl::Hidden, cl::desc("Disable Dealloc Return for Hexagon target")) ( "disable-hexagon-dealloc-ret"  ,
cl::Hidden  ,
cl::desc("Disable Dealloc Return for Hexagon target")   
)
static

◆ EliminateFramePointer

cl::opt< bool > EliminateFramePointer("hexagon-fp-elim", cl::init(true), cl::Hidden, cl::desc("Refrain from using FP whenever possible")) ( "hexagon-fp-elim"  ,
cl::init(true ,
cl::Hidden  ,
cl::desc("Refrain from using FP whenever possible")   
)
static

◆ EnableSaveRestoreLong

cl::opt< bool > EnableSaveRestoreLong("enable-save-restore-long", cl::Hidden, cl::desc("Enable long calls for save-restore stubs."), cl::init(false)) ( "enable-save-restore-long"  ,
cl::Hidden  ,
cl::desc("Enable long calls for save-restore stubs.")  ,
cl::init(false)   
)
static

◆ EnableShrinkWrapping

cl::opt< bool > EnableShrinkWrapping("hexagon-shrink-frame", cl::init(true), cl::Hidden, cl::desc("Enable stack frame shrink wrapping")) ( "hexagon-shrink-frame"  ,
cl::init(true ,
cl::Hidden  ,
cl::desc("Enable stack frame shrink wrapping")   
)
static

◆ EnableStackOVFSanitizer

cl::opt< bool > EnableStackOVFSanitizer("enable-stackovf-sanitizer", cl::Hidden, cl::desc("Enable runtime checks for stack overflow."), cl::init(false)) ( "enable-stackovf-sanitizer"  ,
cl::Hidden  ,
cl::desc("Enable runtime checks for stack overflow.")  ,
cl::init(false)   
)
static

◆ NumberScavengerSlots

cl::opt< unsigned > NumberScavengerSlots("number-scavenger-slots", cl::Hidden, cl::desc("Set the number of scavenger slots"), cl::init(2)) ( "number-scavenger-slots"  ,
cl::Hidden  ,
cl::desc("Set the number of scavenger slots")  ,
cl::init(2)   
)
static

◆ OptimizeSpillSlots

cl::opt< bool > OptimizeSpillSlots("hexagon-opt-spill", cl::Hidden, cl::init(true), cl::desc("Optimize spill slots")) ( "hexagon-opt-spill"  ,
cl::Hidden  ,
cl::init(true ,
cl::desc("Optimize spill slots")   
)
static

◆ ShrinkLimit

cl::opt< unsigned > ShrinkLimit("shrink-frame-limit", cl::init(std::numeric_limits< unsigned >::max()), cl::Hidden, cl::desc("Max count of stack frame shrink-wraps")) ( "shrink-frame-limit"  ,
cl::init(std::numeric_limits< unsigned >::max())  ,
cl::Hidden  ,
cl::desc("Max count of stack frame shrink-wraps")   
)
static

◆ SpillFuncThreshold

cl::opt< int > SpillFuncThreshold("spill-func-threshold", cl::Hidden, cl::desc("Specify O2(not Os) spill func threshold"), cl::init(6)) ( "spill-func-threshold"  ,
cl::Hidden  ,
cl::desc("Specify O2(not Os) spill func threshold")  ,
cl::init(6)   
)
static

◆ SpillFuncThresholdOs

cl::opt< int > SpillFuncThresholdOs("spill-func-threshold-Os", cl::Hidden, cl::desc("Specify Os spill func threshold"), cl::init(1)) ( "spill-func-threshold-Os"  ,
cl::Hidden  ,
cl::desc("Specify Os spill func threshold")  ,
cl::init(1)   
)
static

◆ SpillOptCount

unsigned SpillOptCount = 0
static

Definition at line 196 of file HexagonFrameLowering.cpp.

◆ SpillOptMax

cl::opt< unsigned > SpillOptMax("spill-opt-max", cl::Hidden, cl::init(std::numeric_limits< unsigned >::max())) ( "spill-opt-max"  ,
cl::Hidden  ,
cl::init(std::numeric_limits< unsigned >::max())   
)
static